用乳状液膜体系分离富集柠檬酸根。该体系包括流动载体 (TOA)、表面活性剂 (SPAN80 )、膜的增强剂 (液体石蜡 )、溶剂 (煤油 )和内相 (Na2 CO3 溶液 )。结果表明 ,柠檬酸根的迁移率达 99 6%以上。在此情况下 ,只有柠檬酸根能得到满意的分离富集。该方法已用于富集、测定电镀溶液、工业废水中的柠檬酸根 ,相对标准偏差在 3 8%以下 Separation and enrichment of citrate by emulsion liquid membrane system. The system includes mobile carrier (TOA), surfactant (SPAN80), membrane enhancer (liquid paraffin), solvent (kerosene) and internal phase (Na2CO3 solution). The results show that citrate has a mobility of more than 99 6%. In this case, only citrate can be satisfactorily separated and enriched. The method has been used for enrichment, determination of electroplating solution, citric acid in industrial wastewater, the relative standard deviation of 38% or less